chore(TransactionFeedV2): Show stand by transactions when paginated data is empty

[sviderock]

Description

6th PR for RET-1207. Adds handling of the empty transaction feed. There is a possibility that a new user can have a few pending/failed transactions that are stored in standByTransactions but paginated data returning empty array for the first page. In this case we need to show stand by transactions.

Test plan

Adds test to show stand by transactions if the paginated data is empty.

Related issues

• Relates to RET-1207

Backwards compatibility

Yes

Network scalability

If a new NetworkId and/or Network are added in the future, the changes in this PR will:

• Continue to work without code changes, OR trigger a compilation error (guaranteeing we find it when a new network is added)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.76%. Comparing base (9a5e4f3) to head (a8fcd43).

Additional details and impacted files

@@                          Coverage Diff                           @@
##           slava/cleanup-standby-transactions    #6152      +/-   ##
======================================================================
- Coverage                               88.76%   88.76%   -0.01%     
======================================================================
  Files                                     727      727              
  Lines                                   30776    30780       +4     
  Branches                                 5630     5628       -2     
======================================================================
+ Hits                                    27319    27321       +2     
+ Misses                                   3414     3261     -153     
- Partials                                   43      198     +155     

Files with missing lines	Coverage Δ
src/transactions/feed/TransactionFeedV2.tsx	89.65% <100.00%> (+0.29%)	⬆️

... and 67 files with indirect coverage changes

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